MSM7602-011 OKI [OKI electronic componets], MSM7602-011 Datasheet

no-image

MSM7602-011

Manufacturer Part Number
MSM7602-011
Description
Echo Canceler
Manufacturer
OKI [OKI electronic componets]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MSM7602-011
Manufacturer:
OKI
Quantity:
6 219
E2U0037-28-82
¡ Semiconductor
¡ Semiconductor
MSM7602
Echo Canceler
GENERAL DESCRIPTION
The MSM7602 is an improved version of the MSM7520 with the same basic configuration. The
MSM7602 uses a 19.2 MHz clock frequency to meet PHS, the 3 V power supply (2.7 V to 5.5 V),
and compact packaging. Also, this device adds the howling detecter control pins and main clook
output pins. (See the Appendix)
The MSM7602 is a low-power CMOS IC device for canceling echo (in an acoustic system or
telephone line) generated in a speech path.
Echo is canceled, in digital signal processing, by estimating the echo path and generating a
pseudo echo signal.
When used as an acoustic echo canceler, the device cancels the acoustic echo between the loud
speaker and the microphone which occurs during hands free communication such as with a
cellular phone or a conference system phone.
When used as a line echo canceler, the device cancels the line echo caused by impedance
mismatching in a hybrid.
In addition, the MSM7602 makes possible a quality conversation by controlling the noise level
and preventing howling with howling detector, double talk detector, attenuation function, and
a gain control function. The devise also controls the low level noise with a center clipping
function.
Further, the MSM7602 I/O interface supports m-law PCM . The use of a single chip CODEC, such
as the MSM7566/7704 (3 V) or MSM7543/7533 (5 V), allows an economic and efficient echo
canceler configuration.
FEATURES
• Handles both acoustic echoes and telephone line echoes.
• Cancelable echo delay time:
• Echo attenuation
• Clock frequency
• Power supply voltage : 2.7 V to 5.5 V
• Package options:
MSM7602-001 ................. For a single chip: 23 ms (max.)
MSM7602-011 ................. For a cascade connection (can also be used for a single chip)
28-pin plastic SSOP
56-pin plastic QFP
(SSOP28-P-485-0.65-K)
(QFP56-P-910-0.65-2K)
: 30 dB (typ.)
: 19.2 MHz
Master chip: 23 ms (max.)
Slave chip: 31 ms (max.)
Cancelable up to 209 ms (1 master plus 6 slaves)
For a single chip: 23 ms (max.)
External input and internal oscillator circuit are provided.
(Product name : MSM7602-001GS-K)
(Product name : MSM7602-011GS-2K)
Previous version: Nov. 1996
This version: Aug. 1998
MSM7602
1/29

Related parts for MSM7602-011

MSM7602-011 Summary of contents

Page 1

... Handles both acoustic echoes and telephone line echoes. • Cancelable echo delay time: MSM7602-001 ................. For a single chip (max.) MSM7602-011 ................. For a cascade connection (can also be used for a single chip) Master chip (max.) Slave chip (max.) Cancelable up to 209 ms (1 master plus 6 slaves) For a single chip (max.) • ...

Page 2

... Linear/ P/S SOUT Non–linear WDT * PWDWN * Clock Generator MCKO X1/CLKIN X2 SCKO * * If the MSM7602-011 is used in the slave mode, only the diagonally hatched blocks and the pins marked with * are used. ATT Gain Power Adaptive Calculator FIR Filter (AFF) – Center + ATT Clip ...

Page 3

... Plastic SSOP Symbol Pin Symbol SIN RIN 16 HD SCK 17 X1/CLKIN SYNC 18 X2 SOUT PWDWN ROUT MSM7602 Pin Symbol 22 SYNCO 23 SCKO RST 24 25 WDT MCKO ...

Page 4

... Symbol Pin Symbol PD0 29 PD1 30 PD2 31 X1/CLKIN PD3 32 PD4 33 PWDWN PD5 PD6 36 SYNCO PD7 37 PD8 38 PD9 39 PD10 40 PD11 MSM7602 Pin Symbol PD12 43 * PD13 44 PD14 45 PD15 X2 46 MCKO SF2 OF1 ...

Page 5

... This input signal is loaded in synchronization with the falling edge of the INT signal or the rising edge of the RST signal. I Select signal. This pin selects between the master chip and slave chip when used in a cascade connection. "L": Single chip or master chip "H": Slave chip MSM7602 5/29 ...

Page 6

... Receive serial data. I Input the PCM signal synchronized to SYNC and SCK. Data is read at the falling edge of SCK. I Clock input for transmit/receive serial data. This pin uses the external SCK or the SCKO. Input the PCM CODEC transmit/receive clock (64 to 2048 kHz). MSM7602 6/29 ...

Page 7

... When the internal sync signal (SYNCO, SCKO) is used, input the basic clock of 19.2 MHz. O Crystal oscillator output. Used to configure the oscilation circuit. Refer to the internal clock generator circuit example. When inputting the basic clock externally, insert capacitor with excellent high frequency characteristics between X2 and GND. MSM7602 7/29 ...

Page 8

... Gain control ON "L": Gain control OFF "H" is recommended for echo cancellation. • Slave Chip in a Cascade Connection Fixed at "L" This pin is loaded in synchronization with the falling edge of the INT signal or the rising edge of RST. MSM7602 Description 8/29 ...

Page 9

... Refer to the control pin connection example. Parallel data output flag. O • Single Chip Connect to SF1. • Master Chip in a Cascade Connection Connect to SF2 of the 1st stage slave chip. • Slave Chip in a Cascade Connection Leave open. Refer to the control pin connection example. MSM7602 9/29 ...

Page 10

... OZH PD15 to PD0 with pull- OZL OL SS Input other than the above I — DDO PWDWN = "L" I DDS C — — LOAD MSM7602 Rating Unit –0 –0 0 –55 to +150 ˚ 2 3 Min. Typ. Max. Unit 2.7 3.3 3.6 V — ...

Page 11

... (echo return loss) L RES = ATT, GC, NLP: OFF R = –10 dBm0 kHz band white noise ATT, GC, NLP: OFF T DS MSM7602 = 4 5 –40˚C to +85˚C) DD Typ. Min. Max. Unit — 4 — 0 0.4 V 0.1 — ...

Page 12

... SD t — — — — — — DRS t — — 52 DRE t 100 — — DIT MSM7602 (Ta = –40˚C to +85˚ Unit Min. Typ. Max. — 19.2 — MHz 17.5 — 20 — 52.08 — — 57.14 40 — 20.8 — ...

Page 13

... DF MCK t — — WFO MCK t — t — WFI WFO t — 20 — — 10 — FH MSM7602 (Ta = –40˚C to +85˚ Unit Min. Typ. Max. — — 111 ns — — — — ns 120 — — — — ...

Page 14

... WSO Serial Input Timing SCK SYNC t WSY SIN MSB RIN 7 6 IRLD t t MCH MCL t DCM t DCO t CYO SCK SCK t CYC DIC MSM7602 DCM t DSC LSB MSB DIC t WIR 14/29 ...

Page 15

... Reset Power Down Timing PWDWN t DPS Internal Operation SCK SCK t CYC *Reset timing can be asynchronous t DIT Initialization Processing Start Note: INT is invalid in the diagonally shaded interval. Power Down MSM7602 t DSC t XD High-Z LSB MSB DPE Processing Start 15/29 ...

Page 16

... NLP, HCL, HD, ATT, ADP, GC Parallel Output Timing PD15 High OF1 OF2 Parallel Input Timing SF1 SF2 PD15 CYC t *For IRLD output timing, refer to Serial Input Timing DTH t WPD Output Data WFO t WFI Input Data MSM7602 High-Z 16/29 ...

Page 17

... Semiconductor HOW TO USE THE MSM7602 The MSM7602 cancels (based on the RIN signal) the echo which returns to SIN. Connect the base signal to the R side and the echo generated signal to the S side. Connection Methods According to Echos Example 1: Canceling acoustic echo (to handle acoustic echo from line input) ...

Page 18

... Microphone input For acoustic echo Control Pin Connection Example Single chip connection NLP HCL ADP ATT GC HD PWDWN RST +5 V Asterisk (*) indicates a pin only for the MSM7602-011 2-stage cascade connection Master + (slave ¥ 1) NLP HCL ADP ATT GC HD PWDWN RST +5 V MSM7602 ...

Page 19

... RST INT IRLD SF1 OF1 SF2 OF2 X2 XTAL : 19.2 MHz XTAL C2 GND X2 5pF GND MSM7602 +5 V Slave chip 2 Slave chip 3 MS PD15 MS PD15 NLP NLP HCL PD 0 HCL PD 0 ADP ADP ATT ATT PWDWN PWDWN ...

Page 20

... Vrms = –2.2 dBm (600 W) 0 dBm0 = 0.35 Vrms = –6.9 dBm (600 W) 0 dBm0 = 0.5 Vrms = –3.8 dBm (600 W) MSM7602 0 RIN input level [dBm] 0 dBm = 2.2 dBm0 = Measurement Conditions RIN input = –10 dBm 5 kHz band white noise (0 dBm = 2.2 dBm0) ...

Page 21

... Measurement System Block Diagram White noise generator MSM7543 RIN A 5 kHz A Level meter SOUT PCM RIN ROUT m-law MSM7602 CODEC PCM SOUT SIN Power supply voltage 5 V MSM7602 T MSM7543 D PCM A Delay m-law Echo delay time CODEC PCM A ATT ERL (echo return loss) 21/29 ...

Page 22

... 2 0 0.1 mF R11 = 10 kW MSM7602 3V Line input R6 Line output C10 C11 (AG) For cancellation DV of line echo R8 8 SIN 13 ROUT 11 SYNC 10 SCK ...

Page 23

... Semiconductor Cascade Connection Example When use the MSM7566 for PCM CODEC. DD The MSM7543 and MSM7566 are pin compatible. MSM7602-011GS-2K MSM7602-011GS-2K MSM7602 23/29 ...

Page 24

... After powering ON, be sure to reset. 8. After the power down mode is released (when the PWDWN pin is changed to "H" from "L"), be sure to reset the device this canceler is used to cancel acoustic echoes, an echo attenuation may be less than 30 dB. MSM7602 24/29 ...

Page 25

... ROUT. ERL = (ROUT level) – (SIN level of the ROUT signal which returns as an echo) [dB] If ERL is positive (ROUT > SIN), the system is an attenuator system. If ERL is negative (ROUT < SIN), the system is an amplifier system. PHS : Personal Handy Phone System. MSM7602 25/29 ...

Page 26

... Internal sync signals (SYNCO and SCKO) in MSM7520/7620 are rated at 8 kHz and 200 kHz, respectively frequency of 8 kHz, PCM multiplexing can be applied to no more than three channels. In the MSM7602, SCKO is rated at 256 kHz, while SYNCO at 8 kHz. Thus, PCM multiplexing can be applied with up to four channels. • Addition of basic clock output The use of a crystal oscillator for a clock in the MSM7520/7620 requires an oscillating circuit installed in each of two or more cascade-connected IC chips ...

Page 27

... Semiconductor • Small-sized package MSM7602 MSM7602-001GS-K MSM7602-011GS-2K MSM7520 : 14.0 ¥ 14.0 ¥ 3.75 mm MSM7620 : 14.0 ¥ 14.0 ¥ 2.1 mm • Supply voltage rated at 3 volts MSM7520/7620 4 5.5 V MSM7602 2 5.5 V Package code :SSOP28-P-485-0.65-K :9.5 ¥ 10.5 ¥ 1.85 :28-pin SSOP :QFP56-P-910-0.65-2K :9.5 ¥ 10.5 ¥ 1.85 :56-pin QFP 5 V typ. 3 typ. ...

Page 28

... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM7602 (Unit : mm) Package material Epoxy resin ...

Page 29

... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM7602 (Unit : mm) Package material Epoxy resin ...

Related keywords